The show is a pyramid scheme.We all know about those years that Fox had several upon several good shows and unneeded efforts that came around at the wrong time. This is the final step in that scheme.
The show will end after the Archer crossover.Since the crossover will be Archer, as Bob, being attacked by thugs while making burgers and killing them with little effort, and then having to find out why he's so good at it. If Bob was really Archer the whole time, that would mean Bob's Burgers was never a continuity on its own.
All of Bob and Linda's children have some form of Mental Retardation.It explains so much after all.
The show takes place in the same universe as Sanjay And CraigLook at the character designs, they're virtually identical.
Bob's parents are deadIt doesn't seem to bother him to much as he never mentioned him before even relating to the topic of Linda's parents, likely one of his parents died when he was very young and the other parent died a few years after college or so (or even during and Bob dropped out to deal with grief).
Tina is the author, writing of her childhoodEvidence in favor of the thesis: